Taipei, Sept. 22 (CNA) After hitting peak strength on Monday evening, Typhoon Ragasa is expected to gradually weaken over the next 24 hours when it moves to the South China Sea, with the land warning in Taiwan to be lifted Tuesday morning at the earliest, according to the Central Weather Administration (CWA). Taiwan issued a land warning for the typhoon Sunday evening after a sea warning came into effective Sunday morning. The land warning went into effect for Taitung, Pingtung, Hengchun Peninsula and Kaohsiung City, while the sea warning was effective for the Taiwan Strait, waters southeast of Taiwan, the Bashi Channel and the waters around Dongsha Island, Lin said. CWA graphicThe CWA has issued a torrential rain advisory or extremely torrential rain advisory for Taitung and Hualien counties. A torrential rain alert means 24-hour accumulated rainfall exceeds 350mm, or 3-hour accumulated rainfall exceeds 200mm, while an extremely torrential rain warning indicates 24-hour accumulated rainfall exceeding 500mm.